Check Engine Light On 91'

My check engine light goes on once and a while and then turns off. How do I check the code on my 91? or what does that mean?

thanks
john

jon jon jon

http://g2ic.com/tegtips/engine/13.html

hehe
yah
fast blinks = 1st place
slow - 2nd place

so 2 fast and 2 slow

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